clk: qcom: msm8916: Fix return value check in qcom_apcs_msm8916_clk_probe()

In case of error, the function dev_get_regmap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: 81ac38847a1d ("clk: qcom: Add APCS clock controller support")
Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/qcom/apcs-msm8916.c

···
 	struct clk_regmap_mux_div *a53cc;
 	struct regmap *regmap;
 	struct clk_init_data init = { };
-	int ret;
+	int ret = -ENODEV;
 
 	regmap = dev_get_regmap(parent, NULL);
-	if (IS_ERR(regmap)) {
-		ret = PTR_ERR(regmap);
+	if (!regmap) {
 		dev_err(dev, "failed to get regmap: %d\n", ret);
 		return ret;
 	}